Ruling-pen



Nov. 1, 1932. HAFF 1,886,258

RULING PEN Filed Feb. 24, 1930 mvramon;

BY WM Attorney.

Patented Nov. 1, 1932 UNITED STATES PATENT OFFICE HEINRICH EAFF, OF PFRONTEN-RIED, GERMANY, ASSIGNOR TO THE FIRM GEBBUDER HAFF G. M. 3. BL, OF PFRONTEN-RIED, BAVARIA, GERMANY nouns-ran Application filed February 24, 1930, Serial No. 430,885, and in Germany December 6, 1928.

The invention relates to ruling pens which are universally used for drawing purposes since by their construction lines of uniform width are obtainable and the pen is adjustable so that very thin lines or lines of considerably greater widths may be obtained. Ruling ens consist of two arms which have sharp e ges at their ends or points of contact with the paper so that sharply defined lines are produced and so that very fine lines can be obtained. The two points are usually resiliently mounted or carried so that adjustment for the width of line desired may be readily obtained.

Ruling pens are generally made of tool steel because this steel has resiliency for the purpose referred to above and also because tool steel can be easily tempered in oil or water so that the points of the ruling pen which engage the paper may be hard or wear resisting. The best steel for ruling pens, however, even though hardened does not wear well because the steel must be resilient and when resiliency is desired or necessary a hard wear resisting material cannot be used nor .can the material be hardened as much as possible because the resiliency would be lost thereby. As a result the points of the ruling pen wear rapidly and must be frequently sharpened in order to obtain lines of uni form width and lines which are very fine.

An object of the invention is to construct a ruling pen having arms of a resilient material and the ends or points of the resilient arms have secured thereto a different steel which is very hard and has a high wear resisting property.

Another object is to construct a ruling pen having arms of rust resisting or so-called stainless steel, which is also a resilient steel, and a steel of difi'erent material is secured to the end or point of each arm, which steel is very hard and has high wear resisting properties.

Other objects of the invention will be more apparent from the following description taken in connection with the accompanying drawing in which;

Figure 1 shows a front view of the ruling pen with the attached points, and

tive points I) of the arms of the pen are made of high speed steel or of a hard tool steel having a high wear resisting property and are secured to the ends of the arms a by soldering or welding. By this construction a rul ing pen is obtained which has the usual resilient arms and may be of the popular and very desirable rust resisting or stainless steel and the points, which are subjectedto all of the wear, are of a very hard material having good wearing qualities such as hard tool steel hav ing a high wear resisting property or high speed steel.

Various modifications will occur to those skilled in the art in the composition and configuration of the component elements going to make up this invention as a whole and no limitation is intended by the phraseology of the foregoing specification or illustrations in the accompanying drawing except as indicated in the appended claims.

What I claim is:

1. A ruling pen comprising two adjacent arms of rust resisting and resilient material secured together, means to resiliently flex the arms towards and away from each other to adjust the separation of the points, and points of high speed steel having hard wear resisting qualities secured to the ends of the arms, the points having straight adjacent surfaces and sharp ruling edges at their ends.

2. A ruling pen comprising two adjacent arms of rust resisting and resilient steel secured together, means to resiliently flex the arms towards and away from each other to adjust the separation of the points, and points of high speed steel having hard wear resisting qualities weldedto the ends of the arms, the points having straight adjacent surfaces and sharp ruling edges at their ends.

In testimony whereof I hereunto aflix my signature.

HEINRICH HAFF. 

